docs: def scatter(self, method, args={}, nowait=False, timeout=None, **kwargs):
          """Broadcast method to all agents.
  
          if nowait is False, returns generator to iterate over the results.
  
          :keyword limit: Limit number of reads from the queue.
              Unlimited by default.
          :keyword timeout: the timeout (in float seconds) waiting for replies.
              Default is :attr:`default_timeout`.
  
           **Examples**
  
          ``scatter`` is a generator (if nowait is False)::
              >>> res = scatter()
              >>> res.next() # one event consumed, or timed out.
  
              >>> res = scatter(limit=2):
              >>> for i in res:  # two events consumed or timeout
              >>>     pass
  
          See :meth:`call_or_cast` for a full list of supported
          arguments.
  
          """
          timeout = timeout if timeout is not None else self.default_timeout
          r = self.call_or_cast(method, args, type=ACTOR_TYPE.SCATTER,
                                nowait=nowait, timeout=timeout, **kwargs)
          if not nowait:
              return r.gather(timeout=timeout, **kwargs)